Well I don't know what's going on with it?
I uninstalled it on both machines again and reinstalled. I did not save the ini file, but just started from scratch on each.
Now it's working again.
I just don't understand why it stops working when I have made no changes to it?
I hope I don't have to keep reinstalling it every few days.

It's a brilliant program, but it's frustrating me a little.
I get a bit crapped off if I can't work my duo when I have time to play. I think I've become a little addicted to this style of play